You really need to learn Perl before using it. If you use HTML::Parser, first learn how HTML works and then how HTML::Parser works (all after learning Perl).

Quoth Scott Walters:

Perl programming requires three skills:

• Knowledge of the syntax and features of the core language. The Beginning Perl thing is the path to that.
• CPAN. Anything more complex than a few lines of Perl, go running to http://search.cpan.org/ and search. There is probably a module to do what you want to do.
• Critical thinking. You're on your own there.

No language can get rid of the need for critical thinking, though many languages downplay the importance of it, or even scoff at it.

You have the CPAN thing figured out, but lack critical thinking and knowledge of the language.